#!/usr/bin/env node

class Circle {
    constructor(radius) {
      this.radius = radius;
    }
  
    get diameter() {
      return this.radius * 2;
    }
  
    get area() {
      return Math.PI * this.radius * this.radius;
    }
  
    get circumference() {
      return 2 * Math.PI * this.radius;
    }
  }
  
  module.exports = Circle;
  console.log('\n04-export-object:\n', module);